Garantta M18 Optical Diffuse Sensor integrates transmitter and receiver inside one housing. It detects objects by receiving light reflected directly from target surfaces, without extra reflector or paired receiver. Ideal for general‑purpose object presence detection on conveyor, packaging and automated machinery.
Model Coding Explanation
Example: GPS‑D18‑N‑NO‑2M
GPS = Garantta Photoelectric Sensor
D18 = M18 Diffuse reflective type
N = NPN output; P = PNP output
NO = Normally‑Open; NC = Normally‑Closed ‑ 2M = Standard 2‑meter cable length
Key Features
✅ M18 cylindrical threaded housing, easy screw‑in mounting with standard lock nuts
✅ All‑in‑one emitter & receiver, single‑side installation, no reflector required
✅ Non‑contact object detection, zero mechanical wear for long service lifespan
✅ Adjustable sensitivity potentiometer, adapt to targets with different color & reflectivity
✅ Power‑on delay function to avoid false triggering during equipment startup
✅ Built‑in digital filter, stable operation under dusty workshop environment
✅ Dual LED status indicator for quick on‑site self‑diagnosis
✅ Multiple circuit protections: reverse‑polarity protection, output reverse‑connection & overload protection
✅ IP67 protection grade, resist dust, water mist and occasional wash‑down
✅ Red LED light source; NPN / PNP output, Normally Open NO / Normally Closed NC optional
✅ Standard 2m cable; custom cable length
Typical Applications
- Conveyor belt object presence checking & product counting
- Packaging & food beverage machinery: bottle, carton, cap detection
- Logistics sorting & material handling equipment
- Automatic door & access control system
- General‑purpose part detection for assembly automation
FAQ
Q1: How to avoid false detection caused by reflective background behind target?
A: Bright glossy background will reflect light and trigger wrong signal. Increase physical distance between sensor and background, reduce sensitivity setting. If background interference cannot be avoided, choose background‑suppression(BGS) diffuse sensor model.
Q2: Sensor insensitive or intermittent signal output?
A:Check whether detection distance exceeds rated range. Move target closer for testing.
Adjust sensitivity potentiometer to higher level.
Clean dust and oil stain on sensor lens surface.
Check power supply voltage stays stable within 10‑30VDC.
Q3: No output signal even object enters detection area?
A:Verify wiring polarity and terminal connection.
Confirm NO/NC mode matches your PLC / controller logic.
Dark‑colored low‑reflectivity target may need higher sensitivity setting.
Q4: Sensor signal abnormal under strong sunlight or workshop lamp light?
A: Direct strong ambient light disturbs optical receiving. Change sensor installation angle or install light‑shielding cover for sensor head.
Q5: Can I get customized cable length or M12 plug‑in connector? Do you support OEM private label?
A: Custom cable length are available. OEM private‑label service can be supported with certain MOQ. Please mark your requirements inside inquiry message.
Q6: Can I become Garantta local distributor for Optical Diffuse Sensor?
A: Yes, we are expanding our global distribution network for full‑range photoelectric and industrial sensors. Send inquiry with your company profile and market information, we will deliver agency terms and wholesale price list.
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